At 23, Mark Zuckerberg is already a conference-circuit regular — seen at last month's TechCrunch40 and again at this month's Web 2.0 Summit. But even fans ding Zuck's presence as dull, wooden and robotic. Is he shy? Nah, "He just doesn't care," says a coworker. Despite his current heavy rotation in the media, he only takes the stage when he's told it's a boost for the company. Don't believe it? Zuckerberg's not even scheduled to appear at the Facebook-themed Graphing Social Patterns conference on Sunday in San Jose. The kickoff keynote will be delivered by LinkedIn's more entertaining founder, Reid Hoffman. Aw come on, Mark. After the look-at-me antics and vain false modesty of the tech industry's quasi-celebrities, it'd be a soul-cleansing relief to come watch you stare at your shoes Adidas sandals.